Manhole riser sleeve



FIG. 1 is a front-left-top perspective view of a manhole riser sleeveshowing my new design.

FIG. 2 is a right side elevational view of the manhole riser sleeve.

FIG. 3 is a left side elevational view of the manhole riser sleeve.

FIG. 4 is a front-left perspective view of the manhole riser sleeve.

FIG. 5 is a front plan view of the manhole riser sleeve; and,

FIG. 6 is a back plan view of the manhole riser sleeve.

CLAIM The ornamental design for a manhole riser sleeve, as shown anddescribed.